[IAUC] IAUC 8811: (123509) 2000 WK_183; C/2006 V2-V10 [25139-2007/05-R1]
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Circular No. 8811
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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(123509) 2000 WK_183
K. S. Noll, Space Telescope Science Institute (STScI); D. C.
Stephens, Brigham Young University; W. M. Grundy, Lowell
Observatory; H. F. Levison, Southwest Research Institute; and S. D.
Kern, STScI, report the detection of a binary companion to the
transneptunian object (123509) in observations made during 2005
Nov. 24.365-24.395 UT with the High Resolution Camera of the
Advanced Camera for Surveys on the Hubble Space Telescope (HST),
using the clear filters with one 300-s exposure at each of four
dithered positions on the detector. The two components are clearly
resolved in each image and in the coadded image; they were
separated by an angular distance of 0".080 +/- 0".004 and differ in
brightness by 0.40 magnitude. The fainter component lies at a
position angle of 138.9 +/- 5.5 deg from the primary. The
projected separation of the objects in the sky plane is 2470 +/- 60
km. The HST corrected for parallax and tracked both components of
(123509) as they moved together at an average rate of 0".50/min.
COMETS C/2006 V2-V10 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8807). C/2006 V2 was very bright, peaking
at mag 1.3 on Nov. 3.154 UT at 11.0 solar radii in C3 images, with
a thin tail that was 1.25 deg long at 8.0 solar radii on Nov. 3.429;
in C2 images, the long, thin tail survived for some hours after the
comet's head had disappeared behind the occulter. C/2006 V3 and V4
were stellar in appearance and faint (mag 7.5). C/2006 V5, V6, V7,
V8, and V10 were somewhat diffuse and faint (mag about 8, 7.5, 7,
7.5, and 8, respectively). C/2006 V9 was stellar in appearance and
of mag about 5 in C3 images; in C2 images, it had a condensed head
and an extremely faint, thin tail that extended to about 17' on Nov.
14.171 at 5 solar radii.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 V2 Nov. 2.013 14 00.6 -18 18 C3/2 JS 2007-B38
C/2006 V3 3.021 14 27.2 -16 13 C2 HS 2007-B38
C/2006 V4 4.013 14 25.3 -17 28 C3 HS 2007-B38
C/2006 V5 7.379 14 46.0 -17 44 C2 HS 2007-B38
C/2006 V6 7.521 14 46.1 -17 43 C2 TH 2007-B38
C/2006 V7 8.579 14 50.6 -18 02 C2 HS 2007-B38
C/2006 V8 11.851 15 04.7 -19 07 C2 RK 2007-B75
C/2006 V9 13.321 14 59.3 -21 16 C3/2 BZ 2007-B75
C/2006 V10 13.993 15 13.4 -19 40 C2 HS 2007-B75
(C) Copyright 2007 CBAT
2007 February 21 (8811) Daniel W. E. Green
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